Floating motor mount



May 31, 1949. A. POLLAK 2,471,773

, j FLOATING MOTOR MOUNT v Filed March 23, 1946 2 Sheets-Sheet l TOR w A ORNEY May 31, 1949.

A. POLI AK FLOATING MOTOR MOUNT 2 She ets-Sheet 2 Filed March 23, 1946 Patented May 31, 1949 t 5. Claims.

This invention relates floating motor mounts.-:

to; improvements in Floating-,mountings-ior motors used for driv-- ing machine units: have heretofore been mounted on carriages having; wheels' or pulleys rolling on fixed tracks towcausetaaamovement .of the motor:

along: such tracks in; av direction axially of or parallel to thenmotor shaft; and'other motors hfi/VGbBBIl'; mounted too tilt about stationarily mounted barstzbut so, far as Iqamaware, no motor} mounting; device has; embodied means which providee-ior both ,an axial movement: and astransverse: tilting miovement of the motor, nor for axial movement" of atiltable motor-carrying rodjombar.

One: ofa the objects of 1 my invention is to providewa floatingwmotommount .imwhich the motoris fixedly mounted on a-imoton-carrying, bar or rode-which is movable axially of or parallel to the motor:shafta-anduthis axialimovement of said,

motor-carrying; bar or red r is preferably facili= tated-by; anti-friction; devices so as to permit facile: movement: ofr thetmotor in such axial I or paralleldirectiom;

Another object1of 1 this inventionis to provide (Cl. 742-2421 a l a construction of'the: type-specified in which the anti-friction devices lfor the axially-movable mo-' tor-carrying rbar or: -rod;:will alsov for-m bearings about I which the mounting rod. and .-motor: may

bettilted'.

Still another ;objeot of my-zinventionv is to provide a highly simplified floating motor mount construction in 1 which a roller-mounting base memberyis provided with spaoedbearings havinggroovedrollers mounted therein, and a motor-.-

carrying; round 1 rod is mounted in the grooves of lize amotor i mount tin which the-motor is r so tiltably mountedtby its oarryingdoar in the grooves or: slots.- of fixed. pulleys rasto rcausewthe --weightand-1; the hrotativez reaction of the motorrto maintain: the drivin igbelt between the-drivin Pulley on-tthe motor! *andvthe gmachin'ei being.- driven in properly tightened :oonditioniaat alli timesvduring a driving; operatiombycthe :motorof another maa chineiorsdrivenunitrrm i Stillfianother feature: of L my invention isnto utilize in a floating motor amount not the-type specifiedla drivinga connection; comprising; a

grooved pulley, onithe. motoi'LsIiaft," 2; grooved? pulleygon the shaitlof ithet-maoliine being; driven" andma driveebelt' preferably,- having; (a round surface andmplacedlunder; suitable tension between theseeshatts .-&ndnp1lllBYS:;bY; the reactionpdue tor the tendency of tlfemotor to rotateijabout" its shaft plusttheaweight ofnthe motor, andfibecause of theiacilitv of 'movementlofthe floating parts andgtsaiditension, axial "movement of the motor to itsipro-per positiontint relationfto; the machinebeingt driven .th'ereby "may" be accomplished a automatically merelyeb'y themtorqlueof said drive-belt which-is appliemto. thetdrive pulley; of the motor by, a variation ,.ofl,tlie1 alignment of said ldrivin and drivenpullysl duringxitlieroperation of the machine being driven bysaidlmotonl With. these-f.and.,otheri--oblieetstin..view, the invention ,oompriseswthe: combination of imembers and arrangement iofifpartsusoj combined as to coact and .cooperate .withteachgotlier. in the" performanoe of. tire-;-funet1ons and the. accomplish"- menta of the: resultsl hereint oontemplated, (and compriseslinaone -of.;its.- adaptations. the species or a pref erredl-formlilll'ustr atedt in the accompanyingidrawings, in whioliizlu Fig 1 isl aeviewa in hsideaele'vation for u a motor mounttandilmotortembodninggmye invention and Fig is a. view, intend; elevation .of" a. motor mount showntintEitlll having, fav belt Ioonnection with a. suitablemaehintto (be driven.

Referringanow ton-these; drawings .which. i1lus-. trate 7 a1: preferredaembodiinent of .''my, I invention, I indicatessatmotor; ofllan'y; suitable design provided. Y with n a edriveshaftl f2; Having mounted thereon. a .driving pullfyr'l l Thelmotornis ,provided with amconventional housingioracasing landmounting base Av having; footiportions 04%, 4 extendinglaterallyito. opposite sides otithe shaft 2.; One DfaSaidfiWb lateralltieextendingzgfoot portions- 4 is. pnovidedtat .onerlsidetfofl. theushait' with a suitable clamp itfixedlmfastned.Itolsaidtfoot portion-4e ofttheibasermember luandhavingfljaws 7 andQtB adaptedg; :upont applioati'on of, pressure, to; close. uponand;totSeounely olampgttherebetween a-motorrearrying rod '92 nAsillustrated, thetelamp is afixedlwfastenedwtoi,the ifoot' Abof A the base memben. 4 and i olamping pressurei istapplied on the i motor-carrying. rodeil-ibylscrew bolts 6 which passt-through-rthet,saidafoot portiomand clamping jaws andeareieprovidedewithtrheads 6 for applicationuofwzatwrenchi-s Thatclampnit-is sufficiently elongatedhtorsecurely enga erthezmotomearrying rod-:9 rand-vita. :cause theamoton. tovbe fixedly; and seounely; mounted rthereonttandebyieonneetiomt as aforesaid, with said foot 4*, said rod will extend along one side edge of the motor in a position parallel to the axis of the motor shaft 2, and will have portions which preferably extend in such axial or parallel direction beyond opposite ends of the motor shaft 2. In the embodiment illustrated, the clamp 5 is somewhat longer than the base member 4 and the rod 9 has extension ends 9 9 projecting in opposite directions from the ends of said clamp.

By my invention, the motor-carrying rod 9 is supported by and mounted to move axially upon rotatable anti-friction devices and is thus movable in said axial direction parallel to the motor shaft. In the embodiment shown, such anti-friction devices comprise rollers suitably mounted and spaced from each other to provide for such movement of the rod 9 along the same, and. for a consequent axial movementof the motor in relation to said rollers. As illustrated,

the rollers lIlIll are mounted in a rollermounting bracket or base-member II provided with spaced bearing-blocks II*---I I having projecting from one side face thereof bearing pins I2 on which said spaced rollers I0, Ill aremounted to rotate. v

Also, in accordance with my invention, the motor-carrying rod '9 is round and the rollers are provided with grooves so that, in addition to the floating axial movement, the said rod may turn about its axis insaid roller grooves which function as bearings therefor. The motor is thus mounted on said rod and said rod is supported to have a tilting movementabout the axis thereof in a direction substantially at a right angle to the aforesaid axial movement.

The construction hereinabove described enables a highly facile axial movement, as aforesaid, and, because of the fact that the motor is fast upon the motor-carrying rod and said rod is supported to be movable axially or endwise on rotatable rollers I0, II! while being held in alignment, I am enabled to take "full advantage of the rotative reaction of the motor to apply tension on a drive-belt I4 between the'drivin-g pulley 3 and a driven pulley [3 of the machine being driven by the motor. Also, the tilting movement hereinabove specified enables application of the weight of the motor through the driving pulley 3 on the motor to a similarly-grooved driven pulley I3 to apply tension between such pulleys by the drivebelt it, which has a round surface and, because of the facility of movement of the floating parts and said tension, axial movement of the motor to its proper position in relation to' the machine being driven thereby may be accomplished automatically merely by the torque of said drive-belt which is applied tothe drive pulley of the motor by a variation of the alignment of said driving and driven pulleys during the operation of the machine being driven by said motor.

Also when a motor-carrying bar is disposed on the motor and mounted on pulleys, as aforesaid, a floating motor mount is produced in which both the weight of the motor and the rotative reaction thereof are fully applied to maintain the driving belt between the driving pulley on the motor andthe machine being driven in properly tightened condition at all times during a driving operation by the motor of another machine or driven unit.

In the embodiment of my invention shown, the foot portion 4 opposite to the mounting portion is provided with acontact or rest member I5 preferably composed of rubber or like material and so positioned in shape as to be slightly ele- 4 vated from the supporting table T during the operation by the motor of a machine and adapted, upon excessive elongation, breaking or removal of the belt, to rest upon the supporting table T and to maintain the motor and its base member 4 in suitably tilted position.

It will be apparent from the above that I have provided a novel, extremely simple and low cost floating motor mount that will be applicable to drive varying types of machine units and to automatically move axially in accordance with the movement in parallel relationship of such machine unit or its driving parts, and that when a driving connection is provided between the motor and machine unit, such as a grooved pulley on the motor shaft, a similar grooved pulley on the machine being driven and a drive-belt, placed under suitable tension between such pulleys, the facility of movement of the motor, because of its floating mount and the tension applied between the pulleys, will enable axial movement of the motor to its proper position in relation to the machine being driven thereby and such axial movement will be accomplished automatically by the torque of the drive belt which is applied to the drive pulley of the motor by any variation of the alignment of saiddriving and driven pulleys during operation of the machine unit by the said motor through said drive belt. Also that a motor mount of the type specified Provides a construction in which the motor fast on its carrying bar is so mounted as to take full advantage of the rotative reaction of the motor as Well as its weight to maintain the driving belt between the driving pulley on the motor and the machine being driven in properly tightened condition at all times during the driving operation by the motor of another machine and unit, and particularly said belt will be so maintained in such tightened condition as to cause any torque thereof produced by a movement of the driven machine to be transmitted to the motor drive-pulley and shaft and to result in an axial movement of the motor into proper alignment with the machine being driven thereby. Application on the belt of too much of the weight of the motor is undesirable and the weight of the motor is so adjusted that it is just over the center, while thebalance of the tension is obtained.- from the rotative reaction of the motor as above indicated, when a load is applied to the driven pulley.

Suitable means is also provided for adjustment of the drive-belt, and, asshown, an elongated bolt-slot II is provided in the roller-mounting base member I i and a suitable bolt I l is adjustable in said slot to adjust the said base member in relation to the machine being driven by the motor. A groove II is also preferably provided in the bottom'of the member II for belt-adjustment purposes. a

Having described my invention, I claim:

1. A floating motor mount embodying, in combination, a motor having a conventional casing, drive-shaft and drive-pulley, a motor-carrying rod fixedly mounted on the motor-casing and extending'parallel to saidshaft, means including anti-friction devices for mounting said rod on said anti-friction devices'to move axially and to carry the motor therewith, and a driving connection between said drive pulley on the motor shaft and a driven pulley on a machine unit tobe driven-by the motor, whereby tensioning of an adjusted drive-belt maybeprocured by the rotative'reaction of the motor. 1

2. A floating motor mount embodying, in combination, a motor having a conventional casing, drive shaft and drive pulley, a motor-carrying rod or bar fixedly mounted on the motor casing and extending parallel to said shaft, mounting means for mountin said rod to move axially and to carry the motor therewith, and a driving connection between said drive pulley on the motor shaft and a driven pulley on a machine unit to be driven by the motor, said mounting means for said rod comprising a bracket and spaced antifriction devices on which said rod is supported to have an axial movement.

3. A floating motor mount embodying, in combination, a motor having a conventional casing, drive shaft and drive pulley, a motor-carrying rod or bar fixedly mounted on the motor and extending parallel to said shaft, mounting means for mounting said rod to move axially thereof and to carry the motor therewith, a driving connection between said drive pulley on the motor shaft and a driven pulley on a machine unit to be driven by the motor, said mounting means for said motor-carrying rod comprising a bracket and spaced anti-friction devices composed of grooved pulleys, and said motor-carrying rod having a round surface to permit a tilting move ment of the motor in cooperation with said sliding movement for the purpose of tensioning the connection between said drive and driven pulleys.

l. A floating motor mount embodying, in combination, a motor having a conventional casing, drive shaft and drive pulley, a motor-carrying rod or bar fixedly mounted on the motor casing and extending parallel to said shaft, mounting means for mounting said motor-carrying rod to move axially and to carry the motor therewith comprising a bracket and spaced grooved pulleys on which said motor-carrying rod is mounted to have an axial movement, said rod having a round surface to permit a tilting movement of the motor in cooperation with said axial movement for the purpose of tensioning the connection between said drive pulley and a driven pulley, said mounting means for said spaced pulleys including upright bearing blocks, spindles projecting from one face of each block on which said pulleys are mounted, and a driving connection between said drive pulley on the motor shaft and the driven pulley on a machine unit to be driven by said motor.

5. A floating motor mount embodying, in combination, a motor having a conventional casing, drive shaft and drive pulley, a motor-carrying rod or bar fixedly mounted on the motor casing and extending parallel to said shaft, mounting means for mounting said motor-carrying rod to move axially and to carry the motor therewith comprising a bracket and spaced grooved pulleys on which said motor-carrying rod is mounted to have an axial movement, said rod having a round surface to permit a tilting movement of the motor in cooperation with said axial movement for the purpose of tensioning the connection between said drive pulley and a driven pulley, said mounting means for said spaced pulleys including upright bearing blocks, spindles projecting from one face of each block on which said pulleys are mounted, and a driving connection between said drive pulley on the motor shaft and the driven pulley on a machine unit to be driven by said motor, said driving and driven pulleys having grooves and said driving connection comprising a tight belt, the members being so disposed and arranged that the torque of the drive belt, which is applied to the drive pulley of the motor by a variation of the alignment of the drive and driven pulleys during operation of the machine unit by the motor, will cause the motor, through the floating motor mount, to be automatically moved axially into proper position in relation to the machine being driven.

ABRAHAM POLLAK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 379,116 Leininger Mar. 6, 1888 1,514,607 Ellis Nov. 11, 1924 2,237,555 Haskell Apr. 8, 1941 

